WILL MARK BRAINLIEST HELP QUICK Find the sum of the digits of the number 6+66+666+6666 + ... +666...66, where the last number contains 100 digits. (sum of digits after adding them, not just sum of numbers)

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?